1400

1400 = 2 x 2 x 2 x 5 x 5 x 7.

1400 is a divisor of 99² - 1.

1400 is the number of different arrangements of 4 non-attacking queens on a 4 x 10 chessboard (A061990).

1400 is 4040 in base 7.

1400 is divisible by the square of the sum of its digits (25) (A072081).

1400 is the sum of the digits in the 41st row of Pascal's triangle (A066600).

Source: What's Special About This Number?